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Boston Red Sox closer Koji Uehara celebrates after teammate Jonny Gomes hit a walk-off solo home run in the ninth inning of an interleague baseball game against the San Diego Padres at Fenway Park in Boston, Wednesday, July 3, 2013. Boston won 2-1. (AP Photo/Elise Amendola)

Detroit's Jim Leyland is managing the American League all-star team this year, and Red Sox manager John Farrell, like most any skipper, has some players he's stumping for. Farrell has called Leyland to discuss the matter, and vice versa.

"Koji (Uehara) and I think Daniel Nava deserves consideration," Farrell said Friday. "Those are the two guys that quickly come to mind."

Both players would be first-time all-stars.

By FanGraphs' wins above replacement, Nava has been the 27th outfielder in the AL (minimum) 250 plate appearances. But his on-base percentage — .372 — is third-best in the league, five points ahead of the next player on the list, Jacoby Ellsbury.

The all-star rosters will be unveiled at 6:30 p.m. ET on Saturday during a FOX telecast, although they're not final. Players can bow out because of injury, and there's also the final vote that runs from Saturday to Thursday at MLB.com, where fans can select one more player for each league's roster.

All-star rosters have 34 players per team, including 13 pitchers. The starting players are voted on by the fans, while reserves are left to a peer vote. Pitchers are chosen by the all-star team managers — so in the AL's case, Leyland.